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FMF Racing  |  SKU: FMF044453

FMF Racing - SS Aluminum Factory 4.1 RCT Muffler Carbon Cap

$649.99
Shipping calculated at checkout.


*To see if this product fits your vehicle, refer to the fitment options below.         


FMF Racing SS Aluminum Factory 4.1 RCT Muffler Carbon Cap

The FMF Racing Factory 4.1 RCT Exhaust takes your ride to the next level with cutting-edge Resonance Chamber Technology™ (RCT), delivering massive power gains and a lighter, more durable design. Engineered for serious riders, this exhaust combines advanced performance with innovative features to give you an edge on the track or trail.

Key Features:

  • Advanced RCT Technology: Internal and external improvements with FMF’s proprietary Resonance Chamber Technology™ provide smoother exhaust flow and massive performance gains throughout the entire RPM range.
  • Factory Forward Engineering: A more compact, shorter design that moves the muffler closer to the engine for centralized mass, improving handling and reducing crash damage susceptibility.
  • Massive Power Gains: Experience increased horsepower, torque, and throttle response for unparalleled acceleration and top-end power.
  • Aerospace-Grade Materials: Constructed from the highest quality proprietary titanium alloy and other aerospace-grade materials, the Factory 4.1 RCT ensures maximum strength and durability while reducing weight.
  • Weight Savings: A lightweight design that shaves off unnecessary pounds, improving your bike’s performance and agility.
  • New RTS (Rapid Tuning System): The new RTS allows for quick and easy tuning, optimizing your exhaust for your specific needs.
  • Natural Aluminum Finish with Carbon End Cap: Available in a sleek, natural aluminum finish with a carbon end cap for a professional, high-performance look.

Why Choose the Factory 4.1 RCT?

  • Maximum Performance: Significant power increases throughout the RPM range, improving overall engine efficiency and rider control.
  • Durable & Lightweight: Designed to withstand tough conditions while offering substantial weight savings for better handling and performance.
  • Built for Riders, by Riders: Manufactured in the USA at FMF’s Southern California factory, each exhaust is handcrafted with precision and passion for off-road performance.
Year Make Model
2023-2024 YAMAHA WR250F
2019-2025 YAMAHA YZ250F
2020-2025 YAMAHA YZ250FX


Delivery and Shipping

  • Most orders ship in 1 to 3 Business Days
  • Free Shipping to Lower 48 - (3 to 6 Day Delivery)
  • Expedited Shipping options Available - (Please Call)
  • Alaska | Puerto Rico | Hawaii Shipping fees Apply

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